Bird watching and qudiao laser pointer
Laser pointer injury can cause a variety of retinal changes, including fovea granularity, wart-like deposits/pigment masses around the fovea or annular hypochromic lesions in the fovea, vitreous hemorrhage, and bleeding at different retinal levels. Complications such as the anterior retinal membrane (ERM), macular hole, choroid neovascularization (CNV), and pigment epithelial scarring may occur during follow-up. Although visual acuity improved spontaneously in some cases during follow-up, late complications such as choroidal retinal scar may be responsible for the delayed deterioration of visual function after the initial improvement. Optical coherence tomography (OCT) in the spectral domain of 10,11,13,17 green laser pointer damage is characterized by vertical high reflection bands, ellipsoid and outer limiting membrane ruptures, and low reflection cavities. 19 The vertical bands usually arise from the retinal pigment epithelium and the overlying photoreceptor outer segment and follow the rest of the photoreceptor cells toward the outer plexus layer.
Tags
Instrument
A large number of recent case reports support the high risk of eye injury from high-power laser Pointers/handheld laser devices. Three-five, 10-16. According to ANSI, each laser designator has a nominal eye danger distance (NOHD), which is the distance at which the laser beam will not cause immediate or long-term damage based on a 0.25 second blink reflection. For a modern high-power 3.5W blue (445 nm) high powered laser designator, this NOHD is about 280 meters or more than 900 feet. In contrast, a 3R laser pointer poses no risk during the 0.25 second blink reflex.
2021-12-15 11:20:23
Your Answer: